| En Name: | Kysyl-Syr |
| Ru Name: | Кысыл-Сыр |
| Loc Name1: | Кыһыл Сыыр |
| Loc Lang1: | Yakut |
| Coordinates: | 63.9°N 168°W |
| Map Label Position: | right |
| Federal Subject: | Sakha Republic |
| Adm District Jur: | Vilyuysky District |
| Adm Selsoviet Jur: | Settlement of Kysyl-Syr |
| Adm Selsoviet Type: | Settlement |
| Adm Ctr Of: | Settlement of Kysyl-Syr |
| Inhabloc Cat: | Urban-type settlement |
| Mun District Jur: | Vilyuysky Municipal District |
| Urban Settlement Jur: | Kysyl-Syr Urban Settlement |
| Mun Admctr Of: | Kysyl-Syr Urban Settlement |
| Pop 2010Census: | 3106 |
| Current Cat Date: | 1974 |
| Postal Codes: | 678214 |
| Bodystyle: | width:23.5em; |
| Kysyl-Syr population | |
| Label1: | 2010 Census |
| Data1: | 3,106 |
| Label2: | 2002 Census |
| Data2: | 3,609 |
| Label3: | 1989 Census |
| Data3: | 7,248 |
| Label4: | 1979 Census |
| Data4: | 5,576 |
Kysyl-Syr (Russian: Кысыл-Сыр; Yakut: Кыһыл Сыыр, Kıhıl Sıır) is an urban locality (an urban-type settlement) in Vilyuysky District of the Sakha Republic, Russia, located 73km (45miles) from Vilyuysk, the administrative center of the district.[1] As of the 2010 Census, its population was 3,106.
Urban-type settlement status was granted to it in 1974.
Within the framework of administrative divisions, the urban-type settlement of Kysyl-Syr[2] is incorporated within Vilyuysky District as the Settlement of Kysyl-Syr. As a municipal division, the Settlement of Kysyl-Syr is incorporated within Vilyuysky Municipal District as Kysyl-Syr Urban Settlement.[3]